-ic b-u bbb bbc bbi bbk bbu bcb bcc bci bck bcu bcv bi- bib bic bii bik biu biv bkb bkc bkk bkv bub buc bui buk buu bvb bvc bvi bvk bvu bvv c-- cbb cbc cbi cbk cbu cbv ccb ccc cci cck ccu ccv ci- cib cic cii cik ciu civ ckb ckc cki cub cuc cui cuk cuu cuv cvb cvc cvi cvk cvu cvv i-v ibb ibc ibi ibk ibu ibv icb icc ici ick icu icv iib iic iii iiu ikb ikc iki ikk iku ikv iu- iub iuc iui ivb ivc ivi ivu ivv kbb kbc kbi kbk kbu kcb kcc kci kck kcu kib kic kii kik kiu kiv kkb kkc kki kkk kku kkv kub kuc kui kuk kuu kvb kvi kvk kvv ubb ubc ubi ubk ubu ubv ucb ucc uci uck ucu ucv uib uic uii uiu ukb ukc uki ukk uku uuc uuu uvb uvc uvu uvv vbc vbi vbk vbv vcc vci vcu vi- vib vic vii vik viu viv vkb vuk vuv vvb vvc vvi vvv